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- W2073249369 abstract "Problem statement: In many hot arid countries, pregnant Holstein Friesian heifers areimported for herd replacement. The calves obtained from exotic cows are exposed to adverse climatein feedlot system resulting in very high morbidity and mortality rates. Diarrhea, dehydration and deathsare causing a major loss to the producers. This study examines the Risk Rates (RR) for morbidity andmortality in pre-weaned calves. Approach: Thirteen commercial dairy farms of small, medium andlarge sizes were surveyed using 1,280 newborn calves. A survey was conducted for calves from theirbirth to weaning at 90 day. Parameters of the study were birth weights, colostrum feeding, growth rate,incidences of diseases, clinical symptoms, post-mortem findings and results of laboratory investigationsof samples obtained from sick and dead calves. Calf housing and feeding management of 13 farms wereinvestigated. Results: RR for morbidity and mortality ranged from 0.3-1.00 and being highest during thefirst week. Most common disease was diarrhea representing 90.6% of the total calves affected. Commonpathogens causing diarrhea were E. coli, Salmonella sp. Klebsiella, Pasturella and rotavirus.Relationship between calf management and morbidity RR for diarrhea was significant (r2 = 627, p = 0.01)and the growth rate was positively correlated (r2 = 0.761, p = 0.1). Diarrhea caused a significant negativeimpact on gross margins of the calf enterprises. Conclusion: Colostrum feeding and housingmanagement were the key factors for causing a high RR for morbidity and mortality. Gross marginloss was significantly influenced by morbidity and mortality RR of calves." @default.
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- W2073249369 date "2010-03-01" @default.
- W2073249369 modified "2023-10-11" @default.
- W2073249369 title "Diarrhea in Pre-Weaned Calves: Relative Risk Rates for Morbidity and Mortality in 13 Commercial Farms of Hot Arid Zone" @default.
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- W2073249369 doi "https://doi.org/10.3844/ajavsp.2010.215.220" @default.
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